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authoritojun <itojun@NetBSD.org>2000-03-02 07:41:49 +0000
committeritojun <itojun@NetBSD.org>2000-03-02 07:41:49 +0000
commit2dc247fc34ed0fd256fd948c164aa2c3d2ba491f (patch)
tree49f0f5d8f5da31dd50a71c1f5a4931a542c3df09 /sys/lib/libkern/__cmsg_alignbytes.c
parent52c11b789af6bb4701f8231be6ec6bbe18ce88c2 (diff)
make CMSG_ALIGN always synchronize with kernel's idea of ALIGNBYTES.
ancillary data alignment will be ALIGNBYTES, not sizeof(long) - 1, from now. CMSG_xx will NOT resolve into constant. if you use CMSG_xx to allocate arrays, you'll lose. bump shlib minor for libc. NOTE: if you are on top of arch with ALIGNBYTES != sizeof(long) - 1, you need to recompile IPv6-related binaries. there is no way to guarantee backward compat in this aspect. sorry for this. this should be the last backward compat breakage for IPv6-related ancillary data manipulation. (we still have PR 9516 for unix-domain sockets...)
Diffstat (limited to 'sys/lib/libkern/__cmsg_alignbytes.c')
-rw-r--r--sys/lib/libkern/__cmsg_alignbytes.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/sys/lib/libkern/__cmsg_alignbytes.c b/sys/lib/libkern/__cmsg_alignbytes.c
new file mode 100644
index 00000000000..0f3079a26a4
--- /dev/null
+++ b/sys/lib/libkern/__cmsg_alignbytes.c
@@ -0,0 +1,44 @@
+/* $NetBSD: __cmsg_alignbytes.c,v 1.1 2000/03/02 07:41:51 itojun Exp $ */
+
+/*-
+ * Copyright (c) 2000 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jun-ichiro Hagino.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/param.h>
+
+int
+__cmsg_alignbytes()
+{
+
+ return ALIGNBYTES;
+}